Foundthis webpage when Googling, scroll down a bit to the monoscope section - with simple valve circuit diagram of test pattern generator! http://www.aade.com/tubepedia/1collection/tubepedia.htm
On 26 mar, 11:29, Nick <n...@desmith.net> wrote: > On Mar 26, 10:18 am, Cobra007 <mic...@xiac.com> wrote: > > > Let's see who will win the race to make the first clock with these > > tubes :-). > > > I still wonder how it will scan a character, do you set the "X-Y" > > voltages for the character and then perform a scan of the character, > > or do you scan a series of characters slice by slice? If you want your > > signal to be compatible for a PAL TV, I think you have to scan a row > > of characters slice by slice, but that would make it more complicated > > than scanning character by character. > > Many of these tubes don't have alphanumerics - they have test cards or > airfield overlays etc. Using one that does have numeric capability to > create a clock display on another CRT is just making life hard - to be > a valid exercise it'll have to be non-digital as using a uP, it would > be quite simple to implement but begs the question "Why?" - if you are > using a uP, then the character generation is is slightly academic > (though you can use the sine/cosine route some have used). > > So, to be a valid exercise it should be completely analogue, and then > preferably hollow-state. > > However, if I ever get round to it (unlikely) I'd go down the uP > route... > > Nick -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
